Oil & Gas
| Fri 17 Jul 2026
Geneva, July 18 -- CNPC Greatwall Drilling Co and China National Petroleum have applied WIPO patent for Continuous Coring Device. Dai Yuncai, Jiao Yang, Liu Haohong, Xie Mengyu, Sun Liwei, Sun Shaoliang, Liu Changyi, Wang Haoran, Zhu Qianqian, Wang Zichen, Su Yang, Xia Boyi, Xu Tao and Luo Jun developed it.
The patent applica..